US20130196014A1 - Method of producing tire vulcanization mold, and tire vulcanization mold - Google Patents
Method of producing tire vulcanization mold, and tire vulcanization mold Download PDFInfo
- Publication number
- US20130196014A1 US20130196014A1 US13/809,518 US201113809518A US2013196014A1 US 20130196014 A1 US20130196014 A1 US 20130196014A1 US 201113809518 A US201113809518 A US 201113809518A US 2013196014 A1 US2013196014 A1 US 2013196014A1
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- US
- United States
- Prior art keywords
- mold
- exhaust hole
- forming member
- sipe blade
- hole forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004073 vulcanization Methods 0.000 title claims description 43
- 238000000034 method Methods 0.000 title claims description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 43
- 239000002184 metal Substances 0.000 claims abstract description 43
- 239000011247 coating layer Substances 0.000 claims abstract description 42
- 238000010111 plaster casting Methods 0.000 claims abstract description 40
- 238000005266 casting Methods 0.000 claims abstract description 33
- 239000011819 refractory material Substances 0.000 claims abstract description 19
- 238000000465 moulding Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 235000012216 bentonite Nutrition 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0613—Means, e.g. sipes or blade-like elements, for forming narrow recesses in the tyres, e.g. cuts or incisions for winter tyres
Definitions
- the present invention relates to a method of producing a tire vulcanization mold, and also relates to a tire vulcanization mold. More particularly, the present invention relates to a method of producing a tire vulcanization mold by which a mold with an exhaust mechanism can he simply produced, and a tire vulcanization mold produced by the method.
- a tire vulcanization mold includes an exhaust mechanism.
- the exhaust mechanism discharges air remaining between a green tire and the mold and gas generated during vulcanization to the outside of the mold.
- a vent hole has often been used as an exhaust mechanism.
- a spew is generated. Therefore, various exhaust mechanisms that do not generate a spew have been proposed (see Patent Documents 1 and 2, for example).
- a multilayered blade is used to ensure sufficient ventilation.
- the multilayered blade is a folded thin plate having an end portion formed by bringing the ends of the plate together and the opposite end portion in which a large gap is formed.
- a block holds the multilayered blade in place.
- the block is fitted in a recessed pocket in a tire molding surface of the mold such that an exhaust chamber defined by the pocket and the block is formed. Air and gas are discharged into the exhaust chamber via a fine gap on the one end and a large gap on the other end of the multilayered blade.
- the exhaust mechanism requires steps of forming the pocket in the tire molding surface of the mold formed by casting; producing an assembly of the block holding the multilayered blade; and fitting the assembly in the pocket. Therefore, the exhaust mechanism of Patent Document 1 has a problem of increase in production time due to increase in the number of processing steps.
- molten metal when casting pieces that constitute a mold, molten metal is divided into a plurality of batches and then shot into a cast.
- the shots lead to the formation of a fine gap at a cast joint portion between the cast pieces due to solidification shrinkage of the molten metal.
- the gap serves as an exhaust passage.
- molten metal should be shot into a cast in a plurality of times, resulting in a problem of increase in production time due to increase in the number of processing steps.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2008-260135
- Patent Document 2 Japanese Patent Application Laid-Open No. 2000-22932.2
- An object of the present invention is to provide a method of producing a tire vulcanization mold by which a mold provided with an exhaust mechanism can be simply produced, and to provide a tire vulcanization mold produced by the method.
- the present invention provides a method of producing a tire vulcanization mold for producing a mold having a surface shape of a plaster casting mold transferred thereon by pouring molten metal onto the surface of the plaster casting mold and solidifying the molten metal, the method being characterized by bringing a root portion of a sipe blade protruding from the surface of the plaster casting mold, the root portion protruding from the surface of the plaster casting mold, to a state of being covered with a coating layer of an easily collapsible refractory material; casting a mold with the shape of the surface of the plaster casting mold transferred thereon and with the root portion of the sipe blade cast therein by pouring molten metal onto the surface of the plaster casting mold of this state; and forming a slit around the root portion of the sipe blade by removing the coating layer after the casting and allowing the slit to communicate with an exhaust hole that communicates with the outside of the mold.
- a tire vulcanization mold includes a sipe blade protruding from a tire molding surface and is produced by solidifying molten metal and is characterized by including a slit around a root portion of the sipe blade, the sipe blade being cast in the tire molding surface.
- the slit is formed by removing a coating layer of an easily collapsible refractory material covering the root portion of the sipe blade, the slit communicating with an exhaust hole that communicates with the outside of the mold.
- the slit is formed around the root portion of the sipe blade by bringing the root portion of the sipe blade protruding from the surface of the plaster casting mold, the root portion protruding from the surface of the plaster casting mold, to the state of being covered with the coating layer of an easily collapsible refractory material; casting the mold on which the surface shape of the plaster casting mold is transferred and in which the root portion of the sipe blade is cast by pouring the molten metal onto the surface of the plaster casting mold of this state; and removing the coating layer after the casting.
- the slit is allowed to communicate with the exhaust hole that communicates with the outside of the mold, thus providing an exhaust mechanism.
- the method makes it possible to simply obtain a tire vulcanization mold of the present invention having an exhaust mechanism.
- a through hole may be provided in the root portion of the sipe blade, and the molten metal may be poured while an area around the through hole is not coated with the coating layer such that the base material of the blade is exposed in the area.
- the thickness of the coating layer is 0.02 mm to 0.10 mm, for example. In this way, sufficient ventilation can be ensured via the slit while the formation of a spew can be reliably prevented.
- a string-shaped exhaust hole forming member of a casting refractory material may be attached to the sipe blade, which is protruding from the surface of the plaster casting mold, so as to be in contact with the coating layer coating the root portion.
- the exhaust hole forming member may be disposed such that the exhaust hole forming member is partially exposed on the mold when the mold is cast by pouring the molten metal.
- the mold may be cast by pouring the molten metal onto the surface of the plaster casting mold in this state.
- the exhaust hole forming member may be removed after the casting to form the exhaust hole. In this way, a cutting process for forming the exhaust hole can he eliminated.
- a projecting portion may be provided on the root portion of the sipe blade, and the exhaust hole forming member may be attached to the sipe blade by thrusting the exhaust hole forming member into the projecting portion.
- a cutout portion may be provided on the root portion of the sipe blade, and the exhaust hole forming member may be attached to the sipe blade by fitting the exhaust hole forming member in the cutout portion.
- FIG. 1 is a plan view of a tire vulcanization mold according to the present invention.
- FIG. 2 is a plan view of a sector of FIG. 1 .
- FIG. 3 is a front view of FIG. 2 .
- FIG. 4 is a plan view of a left half of the piece of FIG. 3 .
- FIG. 5 is a front view of FIG. 4 .
- FIG. 6 illustrates a step of pouring plaster onto the surface of a rubber mold on which a sipe blade is protruded.
- FIG. 7 is a front view of the sipe blade of FIG 6 .
- FIG. 8 is a front view illustrating a step of pouring molten metal onto the surface of a plaster casting mold including the sipe blade to which an exhaust hole forming member is attached.
- FIG. 9 is a plan view illustrating the step of FIG. 8 .
- FIG. 10 is an enlarged front view of the sipe blade and the exhaust hole forming member of FIG. 8 .
- FIG. 11 is front view of a modification of the sipe blade of FIG. 10 .
- FIG. 12 is a cross sectional view illustrating a step of removing a coating layer cast in a cast piece and the exhaust hole forming member.
- Arrows C, R, and W shown in the drawings respectively indicate the circumferential direction, the radial direction, and the width direction of a green tire to be inserted into the vulcanization mold and vulcanized.
- a tire vulcanization mold 1 (hereafter “mold 1 ”) according to the present invention includes a plurality of sectors 2 assembled in a ring shape.
- the mold 1 is of a sectional type.
- the sectors 2 include a plurality of pieces 3 and a back block 4 .
- the pieces 3 are attached to the back block 4 such that the pieces 3 that are adjacent to each other are in intimate contact with each other.
- four pieces 3 which are rectangular in a plan view, are fixed to each of the sectors 2 .
- the inner circumferential surface of each of the pieces 3 serves as a tire molding surface 5 .
- the pieces 3 are formed by solidifying molten metal M.
- the molten metal M is a molten material of metal, such as aluminum or aluminum allay.
- groove molding projections 6 for forming tire grooves are provided integrally with the piece 3 .
- a sipe blade 7 made of stainless steel or the like is protruded.
- the sipe blade 7 includes a root portion 7 a that is cast in the tire molding surface 5 .
- the thickness of the sipe blade 7 is about 0.4 mm to 1.2 mm.
- a slit 8 is formed around the root portion 7 a of the sipe blade 7 , which is covered with a coating layer 10 . After the piece 3 is cast, the slit 8 is formed by removal of the coating layer 10 , which will be described later. The slit 8 communicates with an exhaust hole 9 that communicates with the outside of the piece 3 (mold 1 ).
- the slit 8 has a gap in a range of 0.02 mm to 0.10 mm so as to prevent generation of a spew while ensuring sufficient ventilation through the slit 8 .
- the gap of the slit 8 is illustrated larger than its actual size.
- the exhaust hole 9 according to the present embodiment is formed by removal of a string-shaped exhaust hole forming portion, which will be described later, after the piece 3 is cast.
- the size of the exhaust hole 9 is about 1 mm to 10 mm in terms of outer diameter.
- the exhaust hole 9 is bent.
- the exhaust hole 9 may be straight.
- the pieces 3 are produced by the following method.
- the root portion 7 a of the sipe blade 7 is embedded in a rubber mold 14 , with the sipe blade 7 protruding from the surface of the rubber mold 14 .
- the rubber mold 14 is formed by transferring the surface shape of a master mold.
- the surface of the root portion 7 a of the sipe blade 7 is coated with the coating layer 10 in advance.
- the coating layer 10 is indicated by hatching.
- the root portion 7 a of the sipe blade 7 includes through holes 7 b .
- areas around the through holes 7 b are not coated with the coating layer 10 such that the base material of the sipe blade 7 is exposed.
- the slit 8 is formed.
- the thickness of the coating layer 10 is set in a range of 0.02 mm to 0.10 mm.
- the coating layer 10 is formed of an easily collapsible refractory material that is readily dissolved in water or readily collapsed by shock.
- the easily collapsible refractory material includes solid matter containing a facing material, plaster, and a graphite-based mold releasing agent, for example.
- the facing material is applied onto areas of casting dies that are in contact with hot metal.
- the facing material functions as a heat insulator or a protection material for the casting dies.
- the constituents of the facing material include water, silicate soda, vermiculite, mica, and bentonite.
- the constituents of the graphite-based mold releasing agent include graphite, n-hexane, dimethyl ether, and the like.
- Plaster P is poured onto the surface of the rubber mold 14 to produce a plaster casting mold 12 on which the surface shape of the rubber mold 14 is transferred.
- the sipe blade 7 is protruded, as illustrated in FIG. 8 .
- the root portion 7 a of the sipe blade 7 protrudes from the surface 12 a of the plaster casting mold 12 and is thus exposed.
- Grooves 12 b of the plaster casting mold 12 correspond to the groove molding projections 6 of the mold 1 .
- the molten metal M is poured onto the surface of the plaster casting mold 12 to cast the mold 1 .
- a string-shaped exhaust hole forming member 11 of a casting refractory material is attached to the sipe blade 7 protruding from the surface 12 a of the plaster casting mold 12 .
- the exhaust hole forming member 11 is attached to the sipe blade 7 so as to be in contact with the coating layer 10 coating the root portion 7 a .
- the exhaust hole forming member 11 is extended until its ends come in contact with mold frames 13 .
- the exhaust hole forming member 11 is disposed such that the exhaust hole forming member 11 is partly exposed on the mold 1 when the mold 1 is cast by pouring the molten metal M.
- the exhaust hole forming member 11 is removed in a subsequent step to form the exhaust hole 9 .
- the thickness of the exhaust hole forming member 11 is about 1 mm to 10 mm in terms of outer diameter.
- a projecting portion 7 c may be provided on the root portion 7 a of the sipe blade 7 and the exhaust hole forming member 11 may be attached to the sipe blade 7 by thrusting the exhaust hole forming member 11 into the projecting portion 7 c .
- a cutout portion 7 d may be provided on the root portion 7 a of the sipe blade 7 and the exhaust hole forming member 11 may be attached to the sipe blade 7 by fitting the exhaust hole forming member 11 in the cutout portion 7 d .
- the exhaust hole forming member 11 is made of a casting refractory material.
- the casting refractory material is placed at areas that are in contact with hot metal, such as surfaces of an aluminum melting furnace or a casting frame.
- the exhaust hole forming member 11 functions to prevent erosive wear or the like by aluminum hot metal.
- the casting refractory material includes a mold seal and a casting heat insulating material, for example.
- the mold seal includes kaolin, bentonite, talc, and mineral oil as principal components.
- the casting heat insulating material includes alumina and silica as principal components.
- the mold seal has plasticity. Thus, the mold seal can be easily deformed into an arbitrary shape. Therefore, by using the mold seal as the exhaust hole forming member 11 , the exhaust hole 9 with an arbitrary shape that cannot be formed by a cutting process, such as a bent exhaust hole, can be formed.
- the piece 3 with the shape of the surface 12 a of the plaster casting mold 12 transferred thereon is cast.
- the sipe blade 7 is protruded.
- the exhaust hole forming member 11 is partially exposed. The root portion 7 a of the sipe blade 7 is cast in the piece 3 while being covered with the coating layer 10 .
- the coating layer 10 and the exhaust hole forming member 11 are removed from the cast piece 3 .
- high pressure water ejected out of an injection nozzle 15 is sprayed onto the coating layer 10 and the exhaust hole forming member 11 so as to remove the coating layer 10 and the exhaust hole forming member 11 .
- the areas from which the coating layer 10 has been removed serve as the slit 8 .
- the areas from which the exhaust hole forming member 11 has been removed serve as the exhaust hole 9 .
- the exhaust hole forming member 11 is partially exposed on the end surfaces of the piece 3 .
- the exhaust hole 9 that has been formed communicates with the outside of the piece 3 .
- the slit 8 and the exhaust hole 9 communicate with each other.
- the molten metal M is poured onto the surface 12 a of the plaster casting mold 12 and then solidified.
- the slit 8 constituting an exhaust mechanism can be simply formed in the tire molding surface 5 of the pieces 3 .
- the exhaust hole 9 can be simply formed. Thus, a cutting process for forming the exhaust hole 9 after the piece 3 is cast can be eliminated.
- the piece 3 may be cast by pouring the molten metal M onto the surface 12 a of the plaster casting mold 12 instead of attaching the exhaust hole forming member 11 to the sipe blade 7 .
- the piece 3 is cast, and the coating layer 10 is then removed to form the slit 8 .
- the exhaust hole 9 should be separately formed.
- the exhaust hole 9 communicating with the slit 8 and with the outside of the piece 3 is formed by cuffing the piece 3 .
- casting of the piece 3 is performed such that the molten metal M is poured around the through holes 7 b while the base material of the sipe blade 7 is being exposed.
- the molten metal M that has solidified in the areas around the through holes 7 b and the root portion 7 a of the sipe blade 7 are intimately joined to each other.
- the sipe blade 7 is strongly fixed onto the mold 1 , it is not readily removed
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
A root portion 7 a of a sipe blade 7 that protrudes from a surface 12 a of a plaster casting mold 12 is coated with a coating layer 10 of an easily collapsible refractory material. A string-shaped exhaust hole forming member 11 of a casting refractory material is attached to the sipe blade 7 so as to be in contact with the coating layer 10. Molten metal M is poured onto the surface 12 a of the plaster casting mold 12 in this state so as to cast a mold with the shape of the surface 12 a transferred thereon and with the root portion 7 a of the sipe blade 7 cast therein. The coating layer 10 is thereafter removed to form a slit around the root portion 7 a of the sipe blade 7. The exhaust hole forming member 11 is also removed to form an exhaust hole communicating with the outside of the piece. Therefore, the slit and the exhaust hole communicate with each other. In this way, a mold provided with an exhaust mechanism can be simply produced.
Description
- The present invention relates to a method of producing a tire vulcanization mold, and also relates to a tire vulcanization mold. More particularly, the present invention relates to a method of producing a tire vulcanization mold by which a mold with an exhaust mechanism can he simply produced, and a tire vulcanization mold produced by the method.
- A tire vulcanization mold includes an exhaust mechanism. The exhaust mechanism discharges air remaining between a green tire and the mold and gas generated during vulcanization to the outside of the mold. Conventionally, a vent hole has often been used as an exhaust mechanism. However, when rubber flows into the vent hole during vulcanization, a spew is generated. Therefore, various exhaust mechanisms that do not generate a spew have been proposed (see
Patent Documents 1 and 2, for example). - In the exhaust mechanism proposed in Patent Document 1, a multilayered blade is used to ensure sufficient ventilation. The multilayered blade is a folded thin plate having an end portion formed by bringing the ends of the plate together and the opposite end portion in which a large gap is formed. A block holds the multilayered blade in place. The block is fitted in a recessed pocket in a tire molding surface of the mold such that an exhaust chamber defined by the pocket and the block is formed. Air and gas are discharged into the exhaust chamber via a fine gap on the one end and a large gap on the other end of the multilayered blade. However, the exhaust mechanism requires steps of forming the pocket in the tire molding surface of the mold formed by casting; producing an assembly of the block holding the multilayered blade; and fitting the assembly in the pocket. Therefore, the exhaust mechanism of Patent Document 1 has a problem of increase in production time due to increase in the number of processing steps.
- According to the invention described in
Patent Document 2, when casting pieces that constitute a mold, molten metal is divided into a plurality of batches and then shot into a cast. The shots lead to the formation of a fine gap at a cast joint portion between the cast pieces due to solidification shrinkage of the molten metal. The gap serves as an exhaust passage. According to this invention, however, molten metal should be shot into a cast in a plurality of times, resulting in a problem of increase in production time due to increase in the number of processing steps. - Patent Document 1: Japanese Patent Application Laid-Open No. 2008-260135
- Patent Document 2: Japanese Patent Application Laid-Open No. 2000-22932.2
- An object of the present invention is to provide a method of producing a tire vulcanization mold by which a mold provided with an exhaust mechanism can be simply produced, and to provide a tire vulcanization mold produced by the method.
- In order to achieve the object, the present invention provides a method of producing a tire vulcanization mold for producing a mold having a surface shape of a plaster casting mold transferred thereon by pouring molten metal onto the surface of the plaster casting mold and solidifying the molten metal, the method being characterized by bringing a root portion of a sipe blade protruding from the surface of the plaster casting mold, the root portion protruding from the surface of the plaster casting mold, to a state of being covered with a coating layer of an easily collapsible refractory material; casting a mold with the shape of the surface of the plaster casting mold transferred thereon and with the root portion of the sipe blade cast therein by pouring molten metal onto the surface of the plaster casting mold of this state; and forming a slit around the root portion of the sipe blade by removing the coating layer after the casting and allowing the slit to communicate with an exhaust hole that communicates with the outside of the mold.
- A tire vulcanization mold according to the present invention includes a sipe blade protruding from a tire molding surface and is produced by solidifying molten metal and is characterized by including a slit around a root portion of the sipe blade, the sipe blade being cast in the tire molding surface. The slit is formed by removing a coating layer of an easily collapsible refractory material covering the root portion of the sipe blade, the slit communicating with an exhaust hole that communicates with the outside of the mold.
- According to the method of producing a tire vulcanization mold of the present invention, the slit is formed around the root portion of the sipe blade by bringing the root portion of the sipe blade protruding from the surface of the plaster casting mold, the root portion protruding from the surface of the plaster casting mold, to the state of being covered with the coating layer of an easily collapsible refractory material; casting the mold on which the surface shape of the plaster casting mold is transferred and in which the root portion of the sipe blade is cast by pouring the molten metal onto the surface of the plaster casting mold of this state; and removing the coating layer after the casting. Thus, the process of forming the slit is simplified. The slit is allowed to communicate with the exhaust hole that communicates with the outside of the mold, thus providing an exhaust mechanism.
- The method makes it possible to simply obtain a tire vulcanization mold of the present invention having an exhaust mechanism.
- In the method of producing a tire vulcanization mold according to the present invention, a through hole may be provided in the root portion of the sipe blade, and the molten metal may be poured while an area around the through hole is not coated with the coating layer such that the base material of the blade is exposed in the area. Thus, even when the coating layer is removed after the mold is cast, the molten metal that has solidified in the area around the through hole and the mot portion of the sipe blade are intimately joined to each other. Therefore; the sipe blade is strongly fixed onto the mold.
- The thickness of the coating layer is 0.02 mm to 0.10 mm, for example. In this way, sufficient ventilation can be ensured via the slit while the formation of a spew can be reliably prevented.
- A string-shaped exhaust hole forming member of a casting refractory material may be attached to the sipe blade, which is protruding from the surface of the plaster casting mold, so as to be in contact with the coating layer coating the root portion. The exhaust hole forming member may be disposed such that the exhaust hole forming member is partially exposed on the mold when the mold is cast by pouring the molten metal. The mold may be cast by pouring the molten metal onto the surface of the plaster casting mold in this state. The exhaust hole forming member may be removed after the casting to form the exhaust hole. In this way, a cutting process for forming the exhaust hole can he eliminated.
- By this method, a tire vulcanization mold with an exhaust hole of an arbitrary shape that cannot be formed by a cutting process, such as a bent shape, can be obtained.
- A projecting portion may be provided on the root portion of the sipe blade, and the exhaust hole forming member may be attached to the sipe blade by thrusting the exhaust hole forming member into the projecting portion. Alternatively, a cutout portion may be provided on the root portion of the sipe blade, and the exhaust hole forming member may be attached to the sipe blade by fitting the exhaust hole forming member in the cutout portion. By providing the projecting portion or the cutout portion, the exhaust hole forming member can be attached to the sipe blade in a simple and stable manner. Thus, the problem of the exhaust hole forming member moving at the time of pouring can be prevented.
- These and other objects, features, aspects, and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.
-
FIG. 1 is a plan view of a tire vulcanization mold according to the present invention. -
FIG. 2 is a plan view of a sector ofFIG. 1 . -
FIG. 3 is a front view ofFIG. 2 . -
FIG. 4 is a plan view of a left half of the piece ofFIG. 3 , -
FIG. 5 is a front view ofFIG. 4 . -
FIG. 6 illustrates a step of pouring plaster onto the surface of a rubber mold on which a sipe blade is protruded. -
FIG. 7 is a front view of the sipe blade of FIG 6. -
FIG. 8 is a front view illustrating a step of pouring molten metal onto the surface of a plaster casting mold including the sipe blade to which an exhaust hole forming member is attached. -
FIG. 9 is a plan view illustrating the step ofFIG. 8 . -
FIG. 10 is an enlarged front view of the sipe blade and the exhaust hole forming member ofFIG. 8 . -
FIG. 11 is front view of a modification of the sipe blade ofFIG. 10 . -
FIG. 12 is a cross sectional view illustrating a step of removing a coating layer cast in a cast piece and the exhaust hole forming member. - In the following a method of producing a tire vulcanization mold and a tire vulcanization mold according to the present invention will be described with reference to embodiments shown in the drawings. Arrows C, R, and W shown in the drawings respectively indicate the circumferential direction, the radial direction, and the width direction of a green tire to be inserted into the vulcanization mold and vulcanized.
- As illustrated in
FIG. 1 , a tire vulcanization mold 1 (hereafter “mold 1”) according to the present invention includes a plurality ofsectors 2 assembled in a ring shape. Namely, the mold 1 is of a sectional type. As illustrated inFIGS. 2 and 3 , thesectors 2 include a plurality ofpieces 3 and aback block 4. Thepieces 3 are attached to theback block 4 such that thepieces 3 that are adjacent to each other are in intimate contact with each other. According to the present embodiment, fourpieces 3, which are rectangular in a plan view, are fixed to each of thesectors 2. The inner circumferential surface of each of thepieces 3 serves as atire molding surface 5. Thepieces 3 are formed by solidifying molten metal M. The molten metal M is a molten material of metal, such as aluminum or aluminum allay. - As illustrated in
FIGS. 4 and 5 , on thetire molding surface 5,groove molding projections 6 for forming tire grooves are provided integrally with thepiece 3. Also on thetire molding surface 5, asipe blade 7 made of stainless steel or the like is protruded. Thesipe blade 7 includes aroot portion 7 a that is cast in thetire molding surface 5. The thickness of thesipe blade 7 is about 0.4 mm to 1.2 mm. - A
slit 8 is formed around theroot portion 7 a of thesipe blade 7, which is covered with acoating layer 10. After thepiece 3 is cast, theslit 8 is formed by removal of thecoating layer 10, which will be described later. Theslit 8 communicates with anexhaust hole 9 that communicates with the outside of the piece 3 (mold 1). - Preferably, the
slit 8 has a gap in a range of 0.02 mm to 0.10 mm so as to prevent generation of a spew while ensuring sufficient ventilation through theslit 8. InFIG. 4 , the gap of theslit 8 is illustrated larger than its actual size. Theexhaust hole 9 according to the present embodiment is formed by removal of a string-shaped exhaust hole forming portion, which will be described later, after thepiece 3 is cast. The size of theexhaust hole 9 is about 1 mm to 10 mm in terms of outer diameter. InFIG. 4 , theexhaust hole 9 is bent. However, theexhaust hole 9 may be straight. - When a green tire is vulcanized using the mold 1 composed of the
pieces 3, unwanted air and gas are discharged via theslit 8 into theexhaust hole 9 and further outside the mold 1 through end surfaces of thesectors 2, for example. Thus, appropriate ventilation can be ensured during vulcanization, so that tire vulcanization failure is prevented. - The
pieces 3 are produced by the following method. - As illustrated in
FIG. 6 , theroot portion 7 a of thesipe blade 7 is embedded in arubber mold 14, with thesipe blade 7 protruding from the surface of therubber mold 14. Therubber mold 14 is formed by transferring the surface shape of a master mold. - Preferably, as illustrated in
FIG. 7 , the surface of theroot portion 7 a of thesipe blade 7 is coated with thecoating layer 10 in advance. In the drawing, thecoating layer 10 is indicated by hatching. Theroot portion 7 a of thesipe blade 7 includes throughholes 7 b. Preferably, areas around the throughholes 7 b are not coated with thecoating layer 10 such that the base material of thesipe blade 7 is exposed. By removing thecoating layer 10 in a subsequent step, theslit 8 is formed. Thus, the thickness of thecoating layer 10 is set in a range of 0.02 mm to 0.10 mm. - The
coating layer 10 is formed of an easily collapsible refractory material that is readily dissolved in water or readily collapsed by shock. The easily collapsible refractory material includes solid matter containing a facing material, plaster, and a graphite-based mold releasing agent, for example. The facing material is applied onto areas of casting dies that are in contact with hot metal. The facing material functions as a heat insulator or a protection material for the casting dies. The constituents of the facing material include water, silicate soda, vermiculite, mica, and bentonite. The constituents of the graphite-based mold releasing agent include graphite, n-hexane, dimethyl ether, and the like. - Plaster P is poured onto the surface of the
rubber mold 14 to produce aplaster casting mold 12 on which the surface shape of therubber mold 14 is transferred. On asurface 12 a of theplaster casting mold 12 thus produced, thesipe blade 7 is protruded, as illustrated inFIG. 8 . Theroot portion 7 a of thesipe blade 7 protrudes from thesurface 12 a of theplaster casting mold 12 and is thus exposed.Grooves 12 b of theplaster casting mold 12 correspond to thegroove molding projections 6 of the mold 1. - Next, the molten metal M is poured onto the surface of the
plaster casting mold 12 to cast the mold 1. At this time, as illustrated inFIGS. 8 and 9 , a string-shaped exhausthole forming member 11 of a casting refractory material is attached to thesipe blade 7 protruding from thesurface 12 a of theplaster casting mold 12. The exhausthole forming member 11 is attached to thesipe blade 7 so as to be in contact with thecoating layer 10 coating theroot portion 7 a. At this time, the exhausthole forming member 11 is extended until its ends come in contact with mold frames 13. The exhausthole forming member 11 is disposed such that the exhausthole forming member 11 is partly exposed on the mold 1 when the mold 1 is cast by pouring the molten metal M. The exhausthole forming member 11 is removed in a subsequent step to form theexhaust hole 9. Thus, the thickness of the exhausthole forming member 11 is about 1 mm to 10 mm in terms of outer diameter. - As illustrated in
FIG. 10 , a projectingportion 7 c may be provided on theroot portion 7 a of thesipe blade 7 and the exhausthole forming member 11 may be attached to thesipe blade 7 by thrusting the exhausthole forming member 11 into the projectingportion 7 c. Alternatively, as illustrated inFIG. 11 , acutout portion 7 d may be provided on theroot portion 7 a of thesipe blade 7 and the exhausthole forming member 11 may be attached to thesipe blade 7 by fitting the exhausthole forming member 11 in thecutout portion 7 d. By providing the projectingportion 7 c or thecutout portion 7 d, the exhausthole forming member 11 can be attached to thesipe blade 7 in a simple and stable manner. Thus, the problem of the exhausthole forming member 11 moving at the time of pouring can be prevented. - The exhaust
hole forming member 11 is made of a casting refractory material. The casting refractory material is placed at areas that are in contact with hot metal, such as surfaces of an aluminum melting furnace or a casting frame. The exhausthole forming member 11 functions to prevent erosive wear or the like by aluminum hot metal. The casting refractory material includes a mold seal and a casting heat insulating material, for example. - The mold seal includes kaolin, bentonite, talc, and mineral oil as principal components. The casting heat insulating material includes alumina and silica as principal components. The mold seal has plasticity. Thus, the mold seal can be easily deformed into an arbitrary shape. Therefore, by using the mold seal as the exhaust
hole forming member 11, theexhaust hole 9 with an arbitrary shape that cannot be formed by a cutting process, such as a bent exhaust hole, can be formed. - By pouring the molten metal M onto the
surface 12 a of theplaster casting mold 12 in this state and then solidifying the molten metal M, thepiece 3 with the shape of thesurface 12 a of theplaster casting mold 12 transferred thereon is cast. On the surface (tire molding surface 5) of thecast piece 3, thesipe blade 7 is protruded. On end surfaces of thepiece 3, the exhausthole forming member 11 is partially exposed. Theroot portion 7 a of thesipe blade 7 is cast in thepiece 3 while being covered with thecoating layer 10. - Then, the
coating layer 10 and the exhausthole forming member 11 are removed from thecast piece 3. For example, as illustrated inFIG. 12 , high pressure water ejected out of aninjection nozzle 15 is sprayed onto thecoating layer 10 and the exhausthole forming member 11 so as to remove thecoating layer 10 and the exhausthole forming member 11. The areas from which thecoating layer 10 has been removed serve as theslit 8. The areas from which the exhausthole forming member 11 has been removed serve as theexhaust hole 9. The exhausthole forming member 11 is partially exposed on the end surfaces of thepiece 3. Thus, theexhaust hole 9 that has been formed communicates with the outside of thepiece 3. Furthermore, because the exhausthole forming member 11 has been in contact with thecoating layer 10, theslit 8 and theexhaust hole 9 communicate with each other. - As described above, in the casting step, the molten metal M is poured onto the
surface 12 a of theplaster casting mold 12 and then solidified. Through the casting step and the step of removing thecoating layer 10, theslit 8 constituting an exhaust mechanism can be simply formed in thetire molding surface 5 of thepieces 3. Furthermore, according to the present embodiment, through the casting step and the step of removing the exhausthole forming member 11, theexhaust hole 9 can be simply formed. Thus, a cutting process for forming theexhaust hole 9 after thepiece 3 is cast can be eliminated. - The
piece 3 may be cast by pouring the molten metal M onto thesurface 12 a of theplaster casting mold 12 instead of attaching the exhausthole forming member 11 to thesipe blade 7. In this case, thepiece 3 is cast, and thecoating layer 10 is then removed to form theslit 8. On the other hand, theexhaust hole 9 should be separately formed. Thus, theexhaust hole 9 communicating with theslit 8 and with the outside of thepiece 3 is formed by cuffing thepiece 3. - According to the present embodiment, casting of the
piece 3 is performed such that the molten metal M is poured around the throughholes 7 b while the base material of thesipe blade 7 is being exposed. Thus, even when thecoating layer 10 is removed after the mold 1 is cast, the molten metal M that has solidified in the areas around the throughholes 7 b and theroot portion 7 a of thesipe blade 7 are intimately joined to each other. Thus, because thesipe blade 7 is strongly fixed onto the mold 1, it is not readily removed - This application is based on Japanese Patent Application No. 2010-164287 filed in Japan on Jul. 21, 2010 by the same applicant, the entire content of which is hereby incorporated, by reference.
- The foregoing description of the specific embodiments of the present invention is for illustrative purpose only and not intended to be exhaustive or limit the present invention as described. It is obvious to those skilled in the art that various modifications and variations can be made in view of the foregoing description.
-
- 1 Mold
- 2 Sector
- 3 Piece
- 4 Back block
- 5 Tire molding surface
- 6 Groove molding projections
- 7 Sipe blade
- 7 a Root portion
- 7 b Through hole
- 7 c Projecting portion
- 7 d Cutout portion
- 8 Slit
- 9 Exhaust hole
- 10 Coating layer
- 11 Exhaust hole forming member
- 12 Plaster casting mold
- 12 a Surface
- 12 b Groove
- 13 Mold frame
- 14 Rubber mold
- 15 Injection nozzle
- M Molten metal
- P Plaster
Claims (18)
1. A method of producing a tire vulcanization mold for producing a mold having a surface shape of a plaster casting mold transferred thereon by pouring molten metal onto a surface of the plaster casting mold and solidifying the molten metal, comprising:
bringing a root portion of a sipe blade projected to the surface of the plaster casting mold, the root portion protruding from the surface of the plaster casting mold, to a state of being covered with a coating layer of an easily collapsible refractory material;
casting a mold with the shape of the surface of the plaster casting mold transferred thereon and with the root portion of the sipe blade cast therein by pouring the molten metal onto the surface of the plaster casting mold of this state; and
forming a slit around the root portion of the sipe blade by removing the coating layer after the casting, and allowing the slit to communicate with an exhaust hole that communicates with an outside of the mold.
2. The method of producing the tire vulcanization mold according to claim 1 , comprising:
providing a through hole in the root portion of the sipe blade; and
pouring the molten metal in a state of an area around the through hole not being covered with the coating layer and thus a base material of the blade being left exposed.
3. The method of producing the tire vulcanization mold according to claim 1 , wherein the coating layer has a thickness of 0.02 mm to 0.10 mm.
4. The method of producing the tire vulcanization mold according to claim 1 , comprising:
attaching a string-shaped exhaust hole forming member of a casting refractory material to the sipe blade projected to the surface of the plaster casting, mold, so as to be in contact with the coating layer covering the root portion;
disposing the exhaust hole forming member so as to be partially exposed on the mold when the mold is cast by pouring the molten metal;
casting the mold by pouring the molten metal onto the surface of the plaster casting mold of this state; and
forming the exhaust hole by removing the exhaust hole forming member after the mold is cast.
5. The method of producing the tire vulcanization mold according to claim 4 , comprising:
providing a projecting portion on the root portion of the sipe blade; and
attaching the exhaust hole forming member to the sipe blade by thrusting the exhaust hole forming member into the projecting portion.
6. The method of producing the tire vulcanization mold according to claim 4 , comprising:
providing a cutout portion in the root portion of the sipe blade; and
attaching the exhaust hole forming member to the sipe blade by fitting the exhaust hole forming member in the cutout portion.
7. A tire vulcanization mold including, a sipe blade projected to a tire molding surface and produced by solidifying molten metal,
wherein the tire vulcanization mold comprises:
a slit around a root portion of the sipe blade, the sipe blade being cast in the tire molding surface;
the slit is formed b removing a coating layer of an easily collapsible refractory material covering the root portion of the sipe blade after the mold is cast; and
the slit communicates with an exhaust hole that communicates with an outside of the mold.
8. The tire vulcanization mold according to claim 7 , wherein the exhaust hole is formed by removing a string-shaped exhaust hole forming member of a casting refractory material cast in the molten metal after the mold is cast.
9. The method of producing the tire vulcanization mold according to claim 2 , wherein the coating layer has a thickness of 0.02 mm to 0.10 mm.
10. The method of producing the tire vulcanization mold according to claim 2 , comprising:
attaching a string-shaped exhaust hole forming member of a casting refractory material to the sipe blade projected to the surface of the plaster casting mold, so as to be in contact with the coating layer covering the root portion;
disposing the exhaust hole forming member so as to be partially exposed on the mold when the mold is cast by pouring the molten metal;
casting the mold by pouring the molten metal onto the surface of the plaster casting mold of this state; and
forming the exhaust hole by removing the exhaust hole forming member after the mold is cast.
11. The method of producing the tire vulcanization mold according to claim 3 , comprising:
attaching a string-shaped exhaust hole forming member of a casting refractory material to the sipe blade projected to the surface of the plaster casting mold, so as to be in contact with the coating layer covering the root portion;
disposing the exhaust hole forming member so as to be partially exposed on the mold when the mold is cast by pouring the molten metal;
casting the mold by pouring the molten metal onto the surface of the plaster casting mold of this state; and
forming the exhaust hole by removing the exhaust hole forming member after the mold is cast.
12. The method of producing the tire vulcanization mold according to claim 9 , comprising:
attaching a string-shaped exhaust hole forming member of a casting refractory material to the sipe blade projected to the surface of the plaster casting mold, so as to be in contact with the coating layer covering the root portion;
disposing the exhaust hole forming member so as to be partially exposed on the mold when the mold is cast by pouring the molten metal;
casting the mold by pouring the molten metal onto the surface of the plaster casting mold of this state; and
forming the exhaust hole by removing the exhaust hole forming member after the mold is cast.
13. The method of producing the tire vulcanization mold according to claim 10 , comprising:
providing a projecting portion on the root portion of the sipe blade; and
attaching the exhaust hole forming member to the sipe blade by thrusting, the exhaust hole forming member into the projecting portion.
14. The method of producing the tire vulcanization mold according to claim 11 , comprising:
providing a projecting portion on the root portion of the sipe blade; and
attaching the exhaust hole forming member to the sipe blade by thrusting the exhaust hole forming member into the projecting portion.
15. The method of producing the tire vulcanization mold according to claim 12 , comprising:
providing a projecting portion on the root portion of the sipe blade; and
attaching the exhaust hole forming member to the sipe blade by thrusting the exhaust hole forming member into the projecting portion.
16. The method of producing the tire vulcanization mold according to claim 10 , comprising:
providing a cutout portion in the root portion of the sipe blade; and
attaching the exhaust hole forming member to the sipe blade by fining the exhaust hole forming member in the cutout portion.
17. The method of producing the tire vulcanization mold according to claim 11 , comprising:
providing a cutout portion in the root portion of the sipe blade; and
attaching the exhaust hole forming member to the sipe blade by fitting the exhaust hole forming member in the cutout portion.
18. The method of producing the tire vulcanization mold according to claim 12 , comprising:
providing a cutout portion in the root portion of the sipe blade; and
attaching the exhaust hole forming member to the sipe blade by fitting the exhaust hole forming member in the cutout portion.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010164287A JP4894943B2 (en) | 2010-07-21 | 2010-07-21 | Tire vulcanization mold manufacturing method and tire vulcanization mold |
JP2010-164287 | 2010-07-21 | ||
PCT/JP2011/066412 WO2012011483A1 (en) | 2010-07-21 | 2011-07-20 | Method for producing tire vulcanization mold, and tire vulcanization mold |
Publications (2)
Publication Number | Publication Date |
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US20130196014A1 true US20130196014A1 (en) | 2013-08-01 |
US8656981B2 US8656981B2 (en) | 2014-02-25 |
Family
ID=45496902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/809,518 Expired - Fee Related US8656981B2 (en) | 2010-07-21 | 2011-07-20 | Method of producing tire vulcanization mold, and tire vulcanization mold |
Country Status (6)
Country | Link |
---|---|
US (1) | US8656981B2 (en) |
JP (1) | JP4894943B2 (en) |
KR (1) | KR101331110B1 (en) |
CN (1) | CN103025497A (en) |
DE (1) | DE112011102421T5 (en) |
WO (1) | WO2012011483A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8689855B2 (en) | 2011-04-14 | 2014-04-08 | The Yokohama Rubber Co., Ltd. | Tire vulcanizing mold manufacturing method, and tire vulcanizing mold |
US20210252747A1 (en) * | 2018-07-21 | 2021-08-19 | Compagnie Generale Des Etablissements Michelin | Method for producing a molding element having an air discharge slot |
Families Citing this family (9)
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JP5104972B2 (en) * | 2011-04-14 | 2012-12-19 | 横浜ゴム株式会社 | Manufacturing method of tire vulcanization mold |
JP5104973B2 (en) * | 2011-04-14 | 2012-12-19 | 横浜ゴム株式会社 | Manufacturing method of tire vulcanization mold |
DE102012104500B4 (en) | 2012-05-24 | 2022-01-13 | Continental Reifen Deutschland Gmbh | Vulcanizing mold for vehicle tires |
JP5994517B2 (en) * | 2012-09-21 | 2016-09-21 | 横浜ゴム株式会社 | Tire vulcanization mold manufacturing method and tire vulcanization mold |
JP5913270B2 (en) * | 2013-12-04 | 2016-04-27 | 株式会社ブリヂストン | Manufacturing method of tire vulcanizing mold |
DE102016222182A1 (en) | 2016-11-11 | 2018-05-17 | Continental Reifen Deutschland Gmbh | Vulcanization mold and pneumatic vehicle tires |
DE102016222183A1 (en) | 2016-11-11 | 2018-05-17 | Continental Reifen Deutschland Gmbh | Vulcanization mold and pneumatic vehicle tires |
CN106862484B (en) * | 2017-04-17 | 2019-02-22 | 山东豪迈机械科技股份有限公司 | A kind of device, method and casting mould for processing casting mould |
US11007735B2 (en) * | 2019-08-08 | 2021-05-18 | The Goodyear Tire & Rubber Company | Tire mold |
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JPS62199242A (en) * | 1986-02-26 | 1987-09-02 | Hashiba Tekko Kk | Vent hold forming method for tire mold |
JPH11300746A (en) * | 1998-04-24 | 1999-11-02 | Yokohama Rubber Co Ltd:The | Mold for molding tire and its production |
JP3733271B2 (en) | 1998-12-10 | 2006-01-11 | 横浜ゴム株式会社 | Tire vulcanization mold, method for producing the same, pneumatic tire molded using the mold, and method for producing the same |
JP2001150443A (en) | 1999-11-24 | 2001-06-05 | Yokohama Rubber Co Ltd:The | Method for detecting and adjusting air leak amount of mold for vulcanizing and molding tire |
JP2003236642A (en) * | 2002-02-15 | 2003-08-26 | Yokohama Rubber Co Ltd:The | Method for manufacturing plaster mold used in method for manufacturing metallic mold for vulcanizing tire |
ES2386349T3 (en) * | 2002-05-23 | 2012-08-17 | Kabushiki Kaisha Bridgestone | Tire mold part and tire type mold |
JP4382673B2 (en) * | 2002-11-01 | 2009-12-16 | 株式会社ブリヂストン | Manufacturing method of tire vulcanizing mold |
JP2005131685A (en) * | 2003-10-31 | 2005-05-26 | Yokohama Rubber Co Ltd:The | Method for producing metallic mold for tire and sipe forming edge used for this method |
JP2005193577A (en) * | 2004-01-08 | 2005-07-21 | Bridgestone Corp | Tire molding mold |
JP2006212849A (en) * | 2005-02-02 | 2006-08-17 | Ngk Insulators Ltd | Manufacturing method of tire mold |
JP4387421B2 (en) | 2007-04-10 | 2009-12-16 | 東洋ゴム工業株式会社 | Tire mold |
JP5076123B2 (en) * | 2007-10-16 | 2012-11-21 | 東洋ゴム工業株式会社 | Tire mold manufacturing method and tire mold |
JP5136094B2 (en) | 2008-01-31 | 2013-02-06 | 横浜ゴム株式会社 | Manufacturing method of tire vulcanization mold |
JP2010164287A (en) | 2009-01-14 | 2010-07-29 | Konno Kenichi | Land mine removing device |
JP5545749B2 (en) | 2010-11-18 | 2014-07-09 | 株式会社ブリヂストン | Manufacturing method of tire mold |
-
2010
- 2010-07-21 JP JP2010164287A patent/JP4894943B2/en not_active Expired - Fee Related
-
2011
- 2011-07-20 DE DE112011102421T patent/DE112011102421T5/en not_active Withdrawn
- 2011-07-20 KR KR1020137003062A patent/KR101331110B1/en not_active IP Right Cessation
- 2011-07-20 WO PCT/JP2011/066412 patent/WO2012011483A1/en active Application Filing
- 2011-07-20 US US13/809,518 patent/US8656981B2/en not_active Expired - Fee Related
- 2011-07-20 CN CN2011800356792A patent/CN103025497A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8689855B2 (en) | 2011-04-14 | 2014-04-08 | The Yokohama Rubber Co., Ltd. | Tire vulcanizing mold manufacturing method, and tire vulcanizing mold |
US20210252747A1 (en) * | 2018-07-21 | 2021-08-19 | Compagnie Generale Des Etablissements Michelin | Method for producing a molding element having an air discharge slot |
Also Published As
Publication number | Publication date |
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US8656981B2 (en) | 2014-02-25 |
JP4894943B2 (en) | 2012-03-14 |
JP2012024992A (en) | 2012-02-09 |
KR20130021472A (en) | 2013-03-05 |
DE112011102421T5 (en) | 2013-05-16 |
KR101331110B1 (en) | 2013-11-19 |
CN103025497A (en) | 2013-04-03 |
WO2012011483A1 (en) | 2012-01-26 |
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